--- /dev/null
+/* $Id$ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ polypaudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with polypaudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include "iochannel.h"
+#include "sink.h"
+#include "module.h"
+#include "util.h"
+#include "modargs.h"
+#include "xmalloc.h"
+#include "log.h"
+#include "module-esound-sink-symdef.h"
+#include "socket-client.h"
+#include "esound.h"
+#include "authkey.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering")
+PA_MODULE_DESCRIPTION("Esound ")
+PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_USAGE("sink_name=<name for the sink> server=<address> cookie=<filename> format=<sample format> channels=<number of channels> rate=<sample rate>")
+
+#define DEFAULT_SINK_NAME "esound_output"
+
+struct userdata {
+ struct pa_core *core;
+
+ struct pa_sink *sink;
+ struct pa_iochannel *io;
+ struct pa_socket_client *client;
+
+ struct pa_defer_event *defer_event;
+
+ struct pa_memchunk memchunk;
+ struct pa_module *module;
+
+ void *write_data;
+ size_t write_length, write_index;
+
+ void *read_data;
+ size_t read_length, read_index;
+
+ enum { STATE_AUTH, STATE_LATENCY, STATE_RUNNING, STATE_DEAD } state;
+
+ pa_usec_t latency;
+
+ esd_format_t format;
+ int32_t rate;
+};
+
+static const char* const valid_modargs[] = {
+ "server",
+ "cookie",
+ "rate",
+ "format",
+ "channels",
+ "sink_name",
+ NULL
+};
+
+static void cancel(struct userdata *u) {
+ assert(u);
+
+ u->state = STATE_DEAD;
+
+ if (u->io) {
+ pa_iochannel_free(u->io);
+ u->io = NULL;
+ }
+
+ if (u->defer_event) {
+ u->core->mainloop->defer_free(u->defer_event);
+ u->defer_event = NULL;
+ }
+
+ if (u->sink) {
+ pa_sink_disconnect(u->sink);
+ pa_sink_unref(u->sink);
+ u->sink = NULL;
+ }
+
+ if (u->module) {
+ pa_module_unload_request(u->module);
+ u->module = NULL;
+ }
+}
+
+static int do_write(struct userdata *u) {
+ ssize_t r;
+ assert(u);
+
+ if (!pa_iochannel_is_writable(u->io))
+ return 0;
+
+ if (u->write_data) {
+ assert(u->write_index < u->write_length);
+
+ if ((r = pa_iochannel_write(u->io, (uint8_t*) u->write_data + u->write_index, u->write_length - u->write_index)) <= 0) {
+ pa_log(__FILE__": write() failed: %s\n", strerror(errno));
+ return -1;
+ }
+
+ u->write_index += r;
+ assert(u->write_index <= u->write_length);
+
+ if (u->write_index == u->write_length) {
+ free(u->write_data);
+ u->write_data = NULL;
+ u->write_index = u->write_length = 0;
+ }
+ } else if (u->state == STATE_RUNNING) {
+ pa_module_set_used(u->module, pa_idxset_ncontents(u->sink->inputs) + pa_idxset_ncontents(u->sink->monitor_source->outputs));
+
+ if (!u->memchunk.length)
+ if (pa_sink_render(u->sink, PIPE_BUF, &u->memchunk) < 0)
+ return 0;
+
+ assert(u->memchunk.memblock && u->memchunk.length);
+
+ if ((r = pa_iochannel_write(u->io, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length)) < 0) {
+ pa_log(__FILE__": write() failed: %s\n", strerror(errno));
+ return -1;
+ }
+
+ u->memchunk.index += r;
+ u->memchunk.length -= r;
+
+ if (u->memchunk.length <= 0) {
+ pa_memblock_unref(u->memchunk.memblock);
+ u->memchunk.memblock = NULL;
+ }
+ }
+
+ return 0;
+}
+
+static int handle_response(struct userdata *u) {
+ assert(u);
+
+ switch (u->state) {
+ case STATE_AUTH:
+ assert(u->read_length == sizeof(int32_t));
+
+ /* Process auth data */
+ if (!*(int32_t*) u->read_data) {
+ pa_log(__FILE__": Authentication failed: %s\n", strerror(errno));
+ return -1;
+ }
+
+ /* Request latency data */
+ assert(!u->write_data);
+ *(int32_t*) (u->write_data = pa_xmalloc(u->write_length = sizeof(int32_t))) = ESD_PROTO_LATENCY;
+
+ u->write_index = 0;
+ u->state = STATE_LATENCY;
+
+ /* Space for next response */
+ assert(u->read_length >= sizeof(int32_t));
+ u->read_index = 0;
+ u->read_length = sizeof(int32_t);
+
+ break;
+
+ case STATE_LATENCY: {
+ int32_t *p;
+ assert(u->read_length == sizeof(int32_t));
+
+ /* Process latency info */
+ u->latency = (pa_usec_t) ((double) (*(int32_t*) u->read_data) * 1000000 / 44100);
+ if (u->latency > 10000000) {
+ pa_log(__FILE__": WARNING! Invalid latency information received from server\n");
+ u->latency = 0;
+ }
+
+ /* Create stream */
+ assert(!u->write_data);
+ p = u->write_data = pa_xmalloc0(u->write_length = sizeof(int32_t)*3+ESD_NAME_MAX);
+ *(p++) = ESD_PROTO_STREAM_PLAY;
+ *(p++) = u->format;
+ *(p++) = u->rate;
+ pa_strlcpy((char*) p, "Polypaudio Tunnel", ESD_NAME_MAX);
+
+ u->write_index = 0;
+ u->state = STATE_RUNNING;
+
+ /* Don't read any further */
+ pa_xfree(u->read_data);
+ u->read_data = NULL;
+ u->read_index = u->read_length = 0;
+
+ break;
+ }
+
+ default:
+ abort();
+ }
+
+ return 0;
+}
+
+static int do_read(struct userdata *u) {
+ assert(u);
+
+ if (!pa_iochannel_is_readable(u->io))
+ return 0;
+
+ if (u->state == STATE_AUTH || u->state == STATE_LATENCY) {
+ ssize_t r;
+
+ if (!u->read_data)
+ return 0;
+
+ assert(u->read_index < u->read_length);
+
+ if ((r = pa_iochannel_read(u->io, (uint8_t*) u->read_data + u->read_index, u->read_length - u->read_index)) <= 0) {
+ pa_log(__FILE__": read() failed: %s\n", r < 0 ? strerror(errno) : "EOF");
+ cancel(u);
+ return -1;
+ }
+
+ u->read_index += r;
+ assert(u->read_index <= u->read_length);
+
+ if (u->read_index == u->read_length)
+ return handle_response(u);
+ }
+
+ return 0;
+}
+
+static void do_work(struct userdata *u) {
+ assert(u);
+
+ u->core->mainloop->defer_enable(u->defer_event, 0);
+
+ if (do_read(u) < 0 || do_write(u) < 0)
+ cancel(u);
+}
+
+static void notify_cb(struct pa_sink*s) {
+ struct userdata *u = s->userdata;
+ assert(s && u);
+
+ if (pa_iochannel_is_writable(u->io))
+ u->core->mainloop->defer_enable(u->defer_event, 1);
+}
+
+static pa_usec_t get_latency_cb(struct pa_sink *s) {
+ struct userdata *u = s->userdata;
+ assert(s && u);
+
+ return
+ u->latency +
+ (u->memchunk.memblock ? pa_bytes_to_usec(u->memchunk.length, &s->sample_spec) : 0);
+}
+
+static void defer_callback(struct pa_mainloop_api *m, struct pa_defer_event*e, void *userdata) {
+ struct userdata *u = userdata;
+ assert(u);
+ do_work(u);
+}
+
+static void io_callback(struct pa_iochannel *io, void*userdata) {
+ struct userdata *u = userdata;
+ assert(u);
+ do_work(u);
+}
+
+static void on_connection(struct pa_socket_client *c, struct pa_iochannel*io, void *userdata) {
+ struct userdata *u = userdata;
+
+ pa_socket_client_unref(u->client);
+ u->client = NULL;
+
+ if (!io) {
+ pa_log(__FILE__": connection failed: %s\n", strerror(errno));
+ cancel(u);
+ return;
+ }
+
+ u->io = io;
+ pa_iochannel_set_callback(u->io, io_callback, u);
+}
+
+int pa__init(struct pa_core *c, struct pa_module*m) {
+ struct userdata *u = NULL;
+ const char *p;
+ struct pa_sample_spec ss;
+ struct pa_modargs *ma = NULL;
+ assert(c && m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log(__FILE__": failed to parse module arguments\n");
+ goto fail;
+ }
+
+ ss = c->default_sample_spec;
+ if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
+ pa_log(__FILE__": invalid sample format specification\n");
+ goto fail;
+ }
+
+ if ((ss.format != PA_SAMPLE_U8 && ss.format != PA_SAMPLE_S16NE) ||
+ (ss.channels > 2)) {
+ pa_log(__FILE__": esound sample type support is limited to mono/stereo and U8 or S16NE sample data\n");
+ goto fail;
+ }
+
+ u = pa_xmalloc0(sizeof(struct userdata));
+ u->core = c;
+ u->module = m;
+ m->userdata = u;
+ u->format =
+ (ss.format == PA_SAMPLE_U8 ? ESD_BITS8 : ESD_BITS16) |
+ (ss.channels == 2 ? ESD_STEREO : ESD_MONO);
+ u->rate = ss.rate;
+ u->sink = NULL;
+ u->client = NULL;
+ u->io = NULL;
+ u->read_data = u->write_data = NULL;
+ u->read_index = u->write_index = u->read_length = u->write_length = 0;
+ u->state = STATE_AUTH;
+ u->latency = 0;
+
+ if (!(u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss))) {
+ pa_log(__FILE__": failed to create sink.\n");
+ goto fail;
+ }
+
+ if (!(u->client = pa_socket_client_new_string(u->core->mainloop, p = pa_modargs_get_value(ma, "server", ESD_UNIX_SOCKET_NAME), ESD_DEFAULT_PORT))) {
+ pa_log(__FILE__": failed to connect to server.\n");
+ goto fail;
+ }
+ pa_socket_client_set_callback(u->client, on_connection, u);
+
+ /* Prepare the initial request */
+ u->write_data = pa_xmalloc(u->write_length = ESD_KEY_LEN + sizeof(int32_t));
+ if (pa_authkey_load_auto(pa_modargs_get_value(ma, "cookie", ".esd_auth"), u->write_data, ESD_KEY_LEN) < 0) {
+ pa_log(__FILE__": failed to load cookie\n");
+ goto fail;
+ }
+ *(int32_t*) ((uint8_t*) u->write_data + ESD_KEY_LEN) = ESD_ENDIAN_KEY;
+
+ /* Reserve space for the response */
+ u->read_data = pa_xmalloc(u->read_length = sizeof(int32_t));
+
+ u->sink->notify = notify_cb;
+ u->sink->get_latency = get_latency_cb;
+ u->sink->userdata = u;
+ pa_sink_set_owner(u->sink, m);
+ u->sink->description = pa_sprintf_malloc("Esound sink '%s'", p);
+
+ u->memchunk.memblock = NULL;
+ u->memchunk.length = 0;
+
+ u->defer_event = c->mainloop->defer_new(c->mainloop, defer_callback, u);
+ c->mainloop->defer_enable(u->defer_event, 0);
+
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ if (ma)
+ pa_modargs_free(ma);
+
+ pa__done(c, m);
+
+ return -1;
+}
+
+void pa__done(struct pa_core *c, struct pa_module*m) {
+ struct userdata *u;
+ assert(c && m);
+
+ if (!(u = m->userdata))
+ return;
+
+ u->module = NULL;
+ cancel(u);
+
+ if (u->memchunk.memblock)
+ pa_memblock_unref(u->memchunk.memblock);
+
+ if (u->client)
+ pa_socket_client_unref(u->client);
+
+ pa_xfree(u->read_data);
+ pa_xfree(u->write_data);
+
+ pa_xfree(u);
+}
+
+
+